Engraver s vise



.ing vise or holding apparatus.

UNITED STATES PATENT OFFICE.

A. H. WOOD, OF BOSTON, MASSACHUSETTS.

ENGRAVERS VISE.

Specification of Letters Patent No. 27,253, dated February 21, 1860.

To all 'whom 'it may concern:

Be it known that I, A. H. WOOD, of Boston, in the county of Suffolk andState of Massachusetts, have invented a new and useful Apparatus or Visefor Engravers Use and for other Analogous Purposes, and that thefollowing description, taken in connection with the accompanyingdrawing, hereinafter referred to, forms a full and exact Specificationof the same, wherein I have set forth the nature and principles of mysaid invention by which it may be distinguished from all others of asimilar class, together with such parts as I claim and desire to havesecured to me by Letters Patent.

The [igures of the accompanying plate of drawings represent myimprovements.

Figure l is a central, vertical section. Fig. 2 is a plan or top view.

The object of my invention is to produce such a holding and bearingsurface, during the process of engraving and other analogous purposes asnot only to firmly grip the outside to be engraved or Operated upon butalso to allow the said apparatus to yield in some degree, so that thework however irregular in its shape and varying in thickness at itsends, shall be firmly held. This yielding motion which is well known tobe essential has usually heretofore been imperfectly secured by the useof a soft cushion or pad, combined with an ordinary unyield- But inbearing down upon one end of the article tO be engraved or Ornamented,with the requisite force, the other end, being rigidly held by jaws asaforesaid, would produce the eect of breaking or bending or warping thesaid article.

TO secure the desired results above briefly stated and avoid theobjections attendant upon the use of the devices heretofore employed, Ihave so constructed my new apparatus as to hold the article to beoperated upon by means of jaws which are attached tO or form a part of atilting frame turning upon a pivot and bearing upon a suitable spring,the effect being that when a pressure Or bearing down is produced uponone end Of the article to be engraved the same degree of pressure willbe received by the other end,

but in an upward and contrary direction, thereby avoiding the danger ofbending or y warping the work of the Operator and at the l same timeaffording an elastic and yielding bearing surface thereto, the apparatusmoreover being adapted tO holding articles of varying thickness and ofirregular forms.

a a a in the drawings represent a stock Or framework composed of anysuitable material which may be inserted in any suitable standard.

are clamps attached tO or forming a part of a tilting frame c c turningupon a pivot CZ which also passes through the upper end of a verticalshaft f f having` cut upon its lower portion a male screw g engagingwith the female screw Of a turning nut z. h. The tilting frame c c restsupon a collar z' that bears upon a spiral or other spring 7s k'. Fig. lor it may rest directly upon the spring.

The work to be engraved or ornamented is placed between the clamps b band the top plate or cushion Z Z of the stock a a, and fastened theretoby turning the nut L it. Thus it will be seen that the frame c c willtilt ac-' cording to the position in which the pressure is applied andby the action of the spring 7a thereon, an elastic yielding bearing willbe afforded, that is equal and uniform in all directions, therebypreventing the possibility of bending or injuring the work and greatlyfacilitating the manipulations of the operator. By unscrewing the nut hh the tilting frame, by the retracting power of the spring 7c 7c will beraised to any desired extent and the clamps will therefore release thearticle held thereby.

Having thus described my improvements I shall state my claim as follows:

`What I claim as my invention and desire to have secured to me byLetters Patent is The combination of a proper spring with the tiltingframe c 0, operating together in a suitable stock Or standard asdescribed and for the purposes specified.

A. H. WOOD.

Witnesses:

JOSEPH GAvE'r'r, A. W. BROWN.

